Thanks! This is a great ask.
This is mostly gonna be non-shippy fics if that makes sense. I still will do a B/C with other pairings list later this week as well for the other anons :) Some of these still have B or C in them, but hope this list is ok!
brookemopolitan has some nice Alexis centric ones, or ones that explore Alexis and Kate’s relationship: Brick by Brick, Meet the Parents, Of Souffle and Walls. As well as this lovely Martha fic The Taming of the Cop, and this Gates fic They Don’t Know She Knows
ekc293 has some awesome other character centric fics. Alexis related fics; A Mother’s Love, Properties of Equality, Strawberry Milkshakes and Equality. Also Don’t Mention It is a nice little Beckett and Espo friendship fic, and Too Tired to Fight It is an Esplanie fic. and she has some lovely Jim fics; So why don’t we go, Watching from the sidelines, The baffled king composing Hallelujah and The Night Their World Stopped Spinning
lousiemcdoogle has done some great other character fics; Memoirs of an Editor is a really nice fic from Gina’s perspective, And A Bottle Makes Two is her lovely recent Jim fic, and Honeymilk and Happiness which is the gorgeous Ryan and Jenny
liviafan1 wrote a gorgeous Jim and Kate at Johanna’s funeral fic; A Break in the Tide
From Paris, With Love by KyinHI is a great Martha centric fic set after Hunt.
You’re A Good Dad Richard Castle by ninabambina is a nice fic of Alexis and Castle through the years
Wrong and Write by International08 is a pretty hilarious Ryan and Espo fic
Father’s Day Cards by Ripper Shipper is a little past fic with Rick and Martha
and along those lines Shena1’s Crack in the Case is another funny R&E one
Forget About the Boy by ifonly13 is another good Alexis one, as well as a Jim fic, Medicine. A story I adore is War Stories which is a Beckett and Ryan friendship pre series fic. once the foundation’s cracked is a great fic exploring Rick and Meredith’s relationship, and Defining Your Career is one from Montgomery’s perspective
Girls in White Dresses by alwayswritewithcoffee is another great Jim fic
The Joy a Child Brings by CalPal052699 is a wonderful fic from Lanie’s perspective
Tomorrow by Ky03elk is a lovely little Esplanie fic from Under Fire
Implausible Deniability by caffinate-me and Kate Christie is a great one from Gates’ perspective